Drawing-board



(No Model.)

B. A. NEWMAN. DRAWING BOARD. No. 408,315. Patented Aug. 6, 1889.

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N PETERS. Pholo-Ulhographur. Walhinginn. n c.

UNITED STATES ATENT @FFIGE.

EDIVIN A. NEWMAN, OF \VASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OFONE-HALF TO DAVID L. SNEDIKER, OF EMPORIA, KANSAS.

DRAWING-BOARD.

SPECIFICATION forming part of Letters Patent No. 408,315, dated August6, 1889. Application filed November 28, 1888. Serial No. 292,146. (Nomodel.)

To all whom it may concern:

Be it known that I, EDWIN A. NEWMAN, a

citizen of the United States, residing at ashington, in the District ofColumbia, have invented certain new and useful Improvements inDrawing-Boards for Draftsnien, of which the following is aspecification.

The objectof my invention is to provide an improved drawing-board havingperma- I o nently-attached devices for securing the cardboard ordrawii'ig-paper in position.

At the present time drawingpaper is usually attached to thedrawing-board. by means of thumb-tacks. There are many objections tothis way of fastening, as it is necessary to adjust the paper every timeit is secured to the board in order to obtain a true parallelism betweenthe margins of the paper and the edges of the board. Again, whenthumb-tacks are used, the board soon becomes filled with holes, and in ashort time it becomes so punctured that the tacks will not stay inposition. Another disadvantage is that when the paper is removed it isdifficult to replace it in the same position on the board, as isdesirable to preserve measurements. Again, the thumbtacks often obstructthe free movement of the T-square and rule on the drawing-paper.

My invention consists in providing the board with a recess provided witha straight outer edge, against which one edge of the drawingpaper-rests,and in securing to the edge or margin of the board outside the recessdevices that may be readily manipulated to attach the paper to theboard. The securing devices are arrangedin recesses in the board andhold the edge or margin of the paper below the general plane of theboard, so as to admit of the T-square and other like instruments beingused freely on the paper.

My invention also consists in certain details of construction,hereinafter set forth.

In the accompanying drawings, Figure 1 is a plan view of my improveddrawingboard.

Fig. 2 is a detail view showing particularly a plan view of the securingdevices. Fig. 3 is a transverse section through a part of the board onthe line 3 3 of Fig. 2, giving a side view of the securing devices.Figetis a plan view of the two parts of the securing devices detachedfrom the board, and Fig. 5 is an end view of the same.

The drawing-board A is in most respects of usual well-knownconstruction, the main difference being that 011 one side it is cut awayat a to form a groove having an inclined bottom and terminating in avertical wall or edge a. The groove to and vertical wall a are shown asextending lengthwise of the board; but of course they may be arranged 6otransversely. The edge a is made straight and true, so as to form aguide for the drawing-paper.

I have shown in the drawings two devices C for securing the paper to theboard. These devices are preferably located near each end of the board,as shown, in recesses in the edge of the board outside the recess a.

0 indicates a spring-metal finger having at its inner end apertures cfor the screws 0', which secure it in place, and on the opposite end anenlargement or head b,provided with a small sharp-pointed pin (Z,projecting downwardly and adapted to pierce .the margin of the paper Band secure it to the board, as shown in Fig. 3.

D indicates a catch, preferably formed as shown in Fig. 4, having anenlarged inner end provided with apertures c for the screws 0', whichsecure it over the edge of the springlinger O to the board, as shown inFigs. 2 and 3. The outer end of the catch is reduced in size,'as shown,and twisted to form a springshank f, on the outer end of which is atoothor nose 6, which fits over the end of the finger 0 when it is depressedand holds it in place. \Vhen' the finger is depressed and held by thecatch, the pin (Z is firmly held in the paper and board. By taking holdof the catch D at its outer end and bending it sidewise thespring-finger may be lifted and the paper may be removed. The finger Oispreferably made of springjmctal, so, that when the catch is withdrawn itwill withdraw the pin d from the paper, and the tooth or nose 6 of thespring-catch is so formed that it is forced back in the act ofdepressing the springfinger O, and then moves forward again as thespring-finger isqnoved into position upon the card-board. 1o'o 5 outimpediment.

The devices are'perlnanently affixed to the board, and are readilymanipulated.

Having thus described nlyinvention, What I claim as new, and desire tosecure by Letters IO Patent of the United States, is-

1. The combination, substantially as here inbefore, set forth, of thedrawing-board having a recess on one side and the pin-carryingv fingersarranged in recesses in the edge of the I 5 board.

2. The combination, substantially as hereinbefore set forth, of thedrawing-board having a recess 011 one side, the pin-carrying fingersarranged in recesses in the edge of the 20 board, and the catches forholding the fingers in position.

3. The combination, substantially as hereinbefore set forth, of adrawing-board having a recess on one side inclined downwardly toward theedge of the board, a ridge along the margin of the board, thespring-metal pincarrying fingers arranged in recesses in the edge, andthe spring-catches for holding the pin-carrying fingers in position.

4. A drawing-board having a recess on one side inclined downwardlytoward the edge of the board and devices for securing the edge of thedrawing-paper in the recess.

In testimony whereof I have hereunto subscribed my name.

EDWIN A. NEWMAN.

Witnesses:

LLOYD B. \VIGHT, THOS. S. HOPKINS.

